Question

In the following process state transition diagram for a uniprocessor system, assume that there are always some processes in the ready state:

Now consider the following statements:
I. If a process makes a transition D, it would result in another process making transition A immediately
II. A process $P_2$ in blocked state can make transition E while another process $P_1$ is running state
III. The OS uses preemptive scheduling
IV. The OS uses non-preemptive scheduling

Which of the above statements are TRUE?

• A. II and III
• B. II and IV
• C. I and III
• D. I and II

Answer 1

The correct option is A II and III

Transition C indicates that OS uses preemptive scheduling. II is also true.